Sediment deformation and hydrogeology of the Nankai Trough accretionary prism: Synthesis of shipboard results of ODP Leg
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type: ScholarlyArticle
creator: Asahiko Taira
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  family name: Taira
  given name: Asahiko
creator: Ian Ashley Hill
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  family name: Hill
  given name: Ian Ashley
creator: John V Firth
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creator: Ulrich Berner
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creator: Warner Brückmann
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creator: Timothy Byrne
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creator: T Chabernau
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creator: Andrew T Fisher
creator: Jean Paul Foucher
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  given name: Jean Paul
creator: Toshitaka Gamo
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  family name: Gamo
  given name: Toshitaka
creator: Joris M Gieskes
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  family name: Gieskes
  given name: Joris M
creator: Roy D Hyndman
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creator: Daniel E Karig
  type: Person
  family name: Karig
  given name: Daniel E
creator: Miriam Kastner
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  family name: Kastner
  given name: Miriam
creator: Yukihiro Kato
  type: Person
  family name: Kato
  given name: Yukihiro
creator: Siegfried J Lallemant
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  family name: Lallemant
  given name: Siegfried J
creator: Ran Lu
  type: Person
  family name: Lu
  given name: Ran
creator: Alex J Maltman
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  family name: Maltman
  given name: Alex J
creator: Gerald F Moore
creator: K Moran
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creator: Gunnar Olafsson
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  given name: Gunnar
creator: W Brechner Owens
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creator: Kevin T Pickering
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  family name: Pickering
  given name: Kevin T
creator: Franca Siena
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  family name: Siena
  given name: Franca
creator: Elliott Taylor
  type: Person
  family name: Taylor
  given name: Elliott
creator: Michael B Underwood
  type: Person
  family name: Underwood
  given name: Michael B
creator: Clive Wilkinson
  type: Person
  family name: Wilkinson
  given name: Clive
creator: Makoto Yamano
  type: Person
  family name: Yamano
  given name: Makoto
creator: J Zhang
date published: 1992
pagination: 431-450
is part of: Earth and Planetary Science Letters
  type: Periodical
  type: PublicationVolume
  volume number: 109(3-4)
additional type: journal article

Andrew T Fisher
type: Person
family name: Fisher
given name: Andrew T

Gerald F Moore
type: Person
family name: Moore
given name: Gerald F

J Zhang
type: Person
family name: Zhang
given name: J

depth
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Length
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alternate name: L

Density
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porosity
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Computed tomography (CT) scan image analysis of Site 808 cores: structural and physical property implications
type: CreativeWork
type: Chapter
creator: Wonn Soh
  type: Person
  family name: Soh
  given name: Wonn
creator: Timothy Byrne
  type: Person
  family name: Byrne
  given name: Timothy
creator: Asahiko Taira
  type: Person
  family name: Taira
  given name: Asahiko
creator: Atsushi Kono
  type: Person
  family name: Kono
  given name: Atsushi
date published: 1993
pagination: 135-140
is part of: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program)
additional type: book chapter
is based on: (Table 2) CT scan measurements of ODP Site 131-808
  type: Dataset
  conforms to: http://mlcommons.org/croissant/1.0
  creator: Wonn Soh
    type: Person
    family name: Soh
    given name: Wonn
  creator: Timothy Byrne
    type: Person
    family name: Byrne
    given name: Timothy
  creator: Asahiko Taira
    type: Person
    family name: Taira
    given name: Asahiko
  creator: Atsushi Kono
    type: Person
    family name: Kono
    given name: Atsushi
  publisher: PANGAEA
    type: Organization
    disambiguating description: Data Publisher for Earth & Environmental Science
  included in data catalog: PANGAEA
    type: DataCatalog
    disambiguating description: Data Publisher for Earth & Environmental Science
  date published: 1993
  additional type: dataset
  description: X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the frontal thrust and décollement to homogeneous and essentially undeformed sediments above the frontal thrust and beneath the décollement. In the CT images, kink-like deformation bands and faults are recognized as obvious bright seams, bands, or stripes with relatively high linear attenuation coefficients. The differences in linear attenuation coefficients relative to the matrix range from 0.021 cm**2/g (kink-like deformation band) to 0.038 cm**2/g (fault). These data suggest a 0.10 g/cm**3 to 0.18 g/cm**3 increase in bulk density within the deformation structures, and they appear to be 13% and 33% more compacted than the nondeformed matrix, respectively. In contrast to the samples from the frontal thrust zone, CT images of the décollement sample exhibit relatively homogeneous textures. The attenuation coefficient of the sample of the décollement indicates bulk density and porosity values of 2.45 g/cm**3 and 18%, respectively. The sample, hence, is approximately 50% more compacted than the sediment outside the décollement zone.
  abstract: X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the frontal thrust and décollement to homogeneous and essentially undeformed sediments above the frontal thrust and beneath the décollement. In the CT images, kink-like deformation bands and faults are recognized as obvious bright seams, bands, or stripes with relatively high linear attenuation coefficients. The differences in linear attenuation coefficients relative to the matrix range from 0.021 cm**2/g (kink-like deformation band) to 0.038 cm**2/g (fault). These data suggest a 0.10 g/cm**3 to 0.18 g/cm**3 increase in bulk density within the deformation structures, and they appear to be 13% and 33% more compacted than the nondeformed matrix, respectively. In contrast to the samples from the frontal thrust zone, CT images of the décollement sample exhibit relatively homogeneous textures. The attenuation coefficient of the sample of the décollement indicates bulk density and porosity values of 2.45 g/cm**3 and 18%, respectively. The sample, hence, is approximately 50% more compacted than the sediment outside the décollement zone.
  citation: Sediment deformation and hydrogeology of the Nankai Trough accretionary prism: Synthesis of shipboard results of ODP Leg
  spatial coverage: Place
    geo: GeoCoordinates
      latitude: 32.35215
      longitude: 134.944366666666
  temporal coverage: 1990-04-04T00:00:00/1990-05-31T00:00:00
  size: QuantitativeValue
    value: 116.0
    unit text: data points
  variable measured: Sample code/label
    type: PropertyValue
    measurement technique: DSDP/ODP/IODP sample designation
  variable measured: DEPTH, sediment/rock
    type: PropertyValue
    unit text: m
    subject of: DefinedTermSet
      has defined term: depth
      has defined term: sediment
      has defined term: rock
      has defined term: Length
  variable measured: Attenuation value
    type: PropertyValue
    unit text: cm**2/g
    measurement technique: X-ray computed tomography (CT)
  variable measured: Attenuation value, standard deviation
    type: PropertyValue
    unit text: ±
    measurement technique: X-ray computed tomography (CT)
    subject of: DefinedTermSet
      has defined term: standard deviation
        type: DefinedTerm
        alternate name: std dev
  variable measured: Attenuation value
    type: PropertyValue
    unit text: cm**2/g
    measurement technique: X-ray computed tomography (CT)
  variable measured: Sample comment
    type: PropertyValue
    measurement technique: X-ray computed tomography (CT)
  variable measured: Density, wet bulk
    type: PropertyValue
    unit text: g/cm**3
    description: from Taira et al. (1992)
    subject of: DefinedTermSet
      has defined term: Density
  variable measured: Porosity
    type: PropertyValue
    unit text: % vol
    description: from Taira et al. (1992)
    subject of: DefinedTermSet
      has defined term: porosity
  license: https://creativecommons.org/licenses/by/3.0/
  conditions of access: unrestricted
  is accessible for free: true
  language: en
  distribution: data matrix.tab
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